• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.145-145
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• 2017

Foxglove aphid, Aulacorthum solani (Kaltenbach), is a Hemipteran insect that infected a wide variety of plants worldwide and caused serious yield losses in crops. The objective of this study was to identify the putative genes to foxglove aphid resistance in wild soybean, PI 366121 (Glycine soja Sieb. and Zucc.). One hundred and forty-one F4:8 recombinant inbred lines developed from a cross between susceptible variety, Williams 82 and foxglove aphid resistance wild soybean, PI 366121 were used. The two type of resistance response, antibiosis and antixenosis resistance were evaluated through choice and no-choice test, graded by the degree of total plant damage and primary infestation leaf damage; a genome-wide molecular linkage map was constructed with 29,898 single-nucleotide polymorphism markers utilizing a Axiom(R) 180K soyaSNP array. Using inclusive composite interval mapping analysis for foxglove aphid resistance, one major candidate QTL on chromosome 7 was identified. The major QTL on chromosome 7 showed both antixenosis and antibiosis resistance responses. The newly identified major QTL was consistent with previously reported QTL, Raso2, which showed around 5 times narrow down interval range with 8 candidate genes. Furthermore, total 1,115 soybean varieties including Glycine soja and Glycine max were exposed to germplasm screening, and 31 varieties, which showed significant antibiosis type foxglove aphid resistance were identified. This result could be useful in breeding for new foxglove aphid resistant soybean cultivars and developing novel insecticides.

• Asian-Australasian Journal of Animal Sciences
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• 제15권9호
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• pp.1250-1256
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• 2002

A novel fine-mapping method exploiting linkage disequilibrium (LD) was applied to better refine the quantitative trait loci (QTL) positions for milk production traits on bovine chromosome 14 in the pedigree comprising 22 paternal half-sib families of a Black-and-White Holstein-Friesian grand-daughter design in the Netherlands for a total of 1,034 sons. The chromosome map was constructed with the 31 genetic markers spanning 90 Kosambi cM with the average inter-marker distance of 3.5 cM. The linkage analyses, in which the effects of sire QTL alleles were assumed random and the random factor of the QTL allelic effects was incorporated into the Animal Model, found the QTL for milk, fat, and protein yield and fat and protein % with the Lod scores of 10.9, 2.3, 6.0, 25.4 and 3.2, respectively. The joint analyses including LD information by use of multi-marker haplotypes highly increased the evidence of the QTL (Lod scores were 25.1, 20.9, 11.0, 85.7 and 17.4 for the corresponding traits, respectively). The joint analyses including DGAT markers in the defined haplotypes again increased the QTL evidence and the most likely QTL positions for the five traits coincided with the position of the DGAT gene, supporting the hypothesis of the direct causal involvement of the DGAT gene. This study strongly indicates that the exploitation of LD information will allow additional gains of power and precision in finding and localising QTL of interest in livestock species, on the condition of high marker density around the QTL region.

• 한국작물학회지
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• 제50권2호
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• pp.131-141
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• 2005

Molecular-based genetic diversity for a set of 141 accessions of Korean barley cultivars and 24 accessions of foreign exotic cultivars were analyzed using random amplified polymorphic DNAs (RAPDs). Different level of genetic variability was observed with 30 random decamer primers in the Korean barley varieties and breeding lines which were preliminarily classified by morphological (hulled & hulless barley) and end-use (malting barley) and/or by the released periods. A total of 74 RAPD bands were scored, and the number of bands per primer varied from 1 to 7 with an average of 2.74. The hulled barley pool had one more marker genotype per primer than the hulless barley pool. The polymorphic information content (PIC) values based on the band pattern frequencies among genotypes varied depending on genetic pools where mean PICs of hulled, hulless and malting barleys were 0.62, 0.57, and 0.43, respectively. Certain genomic loci amplified by opR04, opF01, opB05, and opC13 were highly polymorphic with PIC>0.8. Patterns and temporal trends of genetic diversity assessed over the period from 1970s to 1990s had a tendency to increase, and in particular, this upward slant was quite clear and significant for the hulless barley pool. In the cluster analysis using genetic similarity matrix calculated from RAPD profiles, two major groups and several small subgroups were classified. Major grouping of materials was not affected by the presence of the husk but by their genetic background and the spike-row type. The validity of information on the genetic diversity and relationships between genotypes will have been reviewed to predict their yield potential.

• 한국지반환경공학회 논문집
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• 제7권6호
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• pp.133-143
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• 2006

본 논문에서는 저자가 제안한 유효응력모델을 이용하여 지진시 사면의 동적거동에 관한 수치해석을 수행하였다. 항복함수는 동일한 응력비를 가진 무한개의 방사선을 의미하며, 비관련 유동규칙을 가진 탄소성모델인 UBCSAND를 이용하였다. 이 모델은 FLAC내에 내장된 Mohr-Coulomb모델을 변형한 형태이다. UBCSAND모델을 이용하여 RPI에서 수행한 원심모형실험결과를 예측하였다. 먼저, UBCSAND모델을 Nevada모래를 사용한 반복 직접단순전단시험결과를 이용하여 검증하였으며, 액상화전후의 거동을 예측하였다. 이와 같이 검증된 모델을 원심모형실험에서 계측된 가속도, 과잉간극 수압, 변위와 서로 비교하였다. 일반적으로 계측치와 예측치가 일치하였다. 유효응력모델을 이용한 동적 수치해석기법은 서부 캐나다에서 댐, 교량, 터널, 파이프라인과 관련된 액상화 프로젝트에 실제 사용되고 있다.

• 한국작물학회지
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• 제48권5호
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• pp.413-418
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• 2003

Genetic diversity and soybean sprout-related traits were evaluated in a total of 72 soybean accessions (60 Glycine max, 7 Glycine soja, and 5 Glycine gracilis). 100-seed weight (SW) was greatly varied and ranged from 3.2g to 32.3g in 72 soybean accessions. Positive correlation was observed between GR and hypocotyl length (HL), whereas negative correlation was observed between SW and hypocotyl diameter (HD). Re-evaluation by discarding two soybean genotypes characterized with low GR indicated that much higher correlation of sprout yield (SY) with HD and SW. Based on the principal component analysis (PCA) for sprout-related traits, 57 accessions were classified. Soybean genotypes with better traits for sprout, such as small size of seeds and high SY, were characterized with high PCA 1 and PCA 2 values. The seed size in second is small but showed low GR and SY, whereas the third has large seed, high GR and more than 400% SY. In genetic similarity analysis using 60 SSR marker genotyping, 72 accessions were classified into three major and several minor groups. Nine of twelve accessions that were identified as the representatives of soybean for sprout based on PCA were in a group by the SSR marker analysis, indicating the SSR marker selection of parental genotypes for soybean sprout improvement program.

• 대한임상검사과학회지
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• 제52권4호
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• pp.310-316
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• 2020

마이크로어레이 진단 기법의 발달은 세포유전학적 관점에서, 다양한 종류의 유전학적 질병과 관련하여 새로운 정보를 제공하고, 질병에 대한 기본적인 통찰력을 제공하는데 매우 중요한 역할을 제공하고 있다. 그동안 많은 연구들에서, 마이크로어레이 기술을 활용한 인간 게놈의 유동성과 다양성을 입증해 주었으며, 게놈의 취약성을 식별하기 위한 보다 정확한 진단기법과 적절한 임상 관리 방법을 효율적으로 제공해 왔다. 앞으로 다양한 유전과 관련된 질병에 기존 세포유전학적 방법을 자동화된 마이크로어레이 방법으로 전환한다면, 보다 효율적인 방법으로 질병을 진단하고, 정확성을 향상시키며, 유전자 배열의 암호화 및 복잡한 특성을 밝히는데 매우 중요한 역할을 할 것으로 생각된다. 또한 이 분석 기법을 활용하여 게놈과 인간의 건강, 질병과의 관계를 분석하여 다양한 정보를 미리 제공하여 질병을 예방하고, 질병의 진단 및 치료에도 도움이 될 수 있는 새로운 혁명을 일으킬 수 있을 것으로 기대된다.

• Genomics & Informatics
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• 제19권2호
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• pp.19.1-19.9
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• 2021

Plant height is an important component of plant architecture and significantly affects crop breeding practices and yield. We studied DNA variations derived from F5 recombinant inbred lines (RILs) with 96.8% homozygous genotypes. Here, we report DNA variations between the normal and dwarf members of four lines harvested from a single seed parent in an F6 RIL population derived from a cross between Glycine max var. Peking and Glycine soja IT182936. Whole genome sequencing was carried out, and the DNA variations in the whole genome were compared between the normal and dwarf samples. We found a large number of DNA variations in both the dwarf and semi-dwarf lines, with one single nucleotide polymorphism (SNP) per at least 3.68 kb in the dwarf lines and 1 SNP per 11.13 kb of the whole genome. This value is 2.18 times higher than the expected DNA variation in the F6 population. A total of 186 SNPs and 241 SNPs were discovered in the coding regions of the dwarf lines 1282 and 1303, respectively, and we discovered 33 homogeneous nonsynonymous SNPs that occurred at the same loci in each set of dwarf and normal soybean. Of them, five SNPs were in the same positions between lines 1282 and 1303. Our results provide important information for improving our understanding of the genetics of soybean plant height and crop breeding. These polymorphisms could be useful genetic resources for plant breeders, geneticists, and biologists for future molecular biology and breeding projects.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2022년도 추계학술대회
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• pp.23-23
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• 2022

Rapeseed (Brassica napus L.) is one of the most valuable oilseed crop in the world. It is widely used in various industries, such as food, animal feed, energy and chemical industries. In order to improve the industrial requirements for rapeseed, useful agronomic characteristics (higher yields and disease resistance etc.) and modified oil traits (fatty acid composition and fat content) are important in rapeseed. However, Korea has limiting genetic resources of novel traits in rapeseed. In this research, novel rapeseed mutant genotypes by mutation breeding was developed. The mutant lines were generated by the treatment of the seeds of the original cultivar 'Tamra' with 700 Gy of gamma-ray (⁶⁰Co). Mutants showing varied in flowering time, crude fat content, seed yield and fatty acid content that exhibited stable inheritance of the mutated characteristics from M₅ to M₇ generations were selected. We investigated genetic variation using SNPs identified from GBS analysis in rapeseed mutant lines derived from the gamma-ray, and interactions between the major agronomic and the oil traits. Significantly associated SNP loci were explored along with candidate genes using SNPs obtained by GBS analysis. As a results of association mapping, a total of 322 SNPs were significantly associated with agronomic traits (155 SNPs) and oil traits (167 SNPs). A total of 70 genes were annotated from agronomic characteristics SNPs; among them 7 genes significantly enriched in developmental process, and a total of 70 genes were annotated from crude fat content and fatty acid compositions SNPs; among them, 11genes were significantly enriched in biosynthetic process. These results could be used for the selection of rapeseed cultivar with enhanced qualities and potential economic benefits.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.25-25
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• 2022

Drought becomes frequent and severe because of continuous global warming, leading to a significant loss of crop yield. In soybean (Glycine max [L.]), most of quantitative trait loci (QTLs) analyses for drought tolerance have conducted by investigating yield changes under water-restricted conditions at the reproductive stages. More recently, the necessity of QTL studies to use physiological indices responding to drought at the early growth stages besides the reproductive ones has arisen due to the unpredictable and prevalent occurrence of drought throughout the soybean growing season. In this study, we thus identified QTLs conferring wilting scores and moisture contents of soybean subjected to drought stress in the early vegetative stage using an recombinant inbred line (RIL) population derived from a cross between Taekwang (drought-sensitive) and SS2-2 (drought-tolerant). For the two traits, the same major QTL was located on chromosome 10, accounting for up to 11.5% of phenotypic variance explained with LOD score of 12.5. This QTL overlaps with a reported QTL for the limited transpiration trait in soybean and harbors an ortholog of the Arabidopsis ABA and drought-induced RING-D UF1117 gene. Meanwhile, one of important features of plant drought tolerance is their ability to limit transpiration rates under high vapor pressure deficiency in response to mitigate water loss. However, monitoring their transpiration rates is time-consuming and laborious. Therefore, only a few population-level studies regarding transpiration rates under the drought condition have been reported so far. Via employing an Arduino-based platform, for the reasons addressed, we are measuring and recording total pot weights of soybean plants every hour from the 1^st day after water restriction to the days when the half of the RILs exhibited permanent tissue damage in at least one trifoliate. Gradual decrease in moisture of soil in pots as time passes refers increase in the severity of drought stress. By tracking changes in the total pot weights of soybean plants, we will infer transpiration rates of the mapping parents and their RILs according to different levels of VPD and drought stress. The profile of transpiration rates from different levels of severity in the stresses facilitates a better understanding of relationship between transpiration-related features, such as limited maximum transpiration rates, to water saving performances, as well as those to other drought-responsive phenotypes. Our findings will provide primary insights on drought tolerance mechanisms in soybean and useful resources for improvement of soybean varieties tolerant to drought stress.

• 한국균학회지
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• 제21권3호
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• pp.200-211
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• 1993

사철느타리버섯 Pleurotus florida 균주와 느타리버섯 P. ostreatus 2균주의 영양요구주로 원형질체 융합하여 체세포 잡종을 얻어 자실체의 특성과 후대의 유전자 재조합을 조사하였다. 사철느타리 ASI 2016의 ASI 2-3-rib와 느타리 ASI 2018의 ASI 2-1-arg의 원형질체 융합으로 40개의 체세포잡종($P1{\sim}P40$)을 얻어 그중 P5에서 얻은 유전자 재조합주 P5-M43-arg rib를 다시 느타리 ASI 2001의 ASI 2-13-pro orn과 융합하여 38개 체세포잡종 ($P41{\sim}P78$)을 얻었는데 생산력이 높고 품질이 우수한 P72를 "원형느타리버섯 Wonhyeongneutaribeosus"으로 명명하여 1990년에 보급하였다. 자실체의 갓 색택이 yellowish white인 사철느타리 ASI 2016과 bluish grey인 느타리 ASI 2018의 원형질체 융합주는 중간색인 brownish grey를 나타내었고, P5에 다시 violet grey인 느타리 ASI 2001을 융합한 것은 bluish grey를 나타내었다. 40균주($P1{\sim}P40$)의 자실체 생산량에 있어서 10%만이 양친보다 높았고 40%는 낮았으며 나머지는 양친과 유사하였는데 친주 ASI 2018의 수량지수를 100으로 할 때 융합주는 $27.0{\sim}155.2$로 나타났으며, 체세포 잡종 38균주($P41{\sim}P78$)에 있어서 21.0%는 양친보다 높았고 26.3%는 낮았으며 나머지는 양친과 유사하였는데 ASI 2001을 100으로 할 때 체세포 잡종은 $40.5{\sim}141.3$으로 잡종강세 현상이 나타났다. 수량에 영향을 주는 7 개 형질에 관한 특성에 있어서 P5는 양친주보다 유효경수와 대의 길이는 증가하나 갓의 크기, 대직경, 개체중은 감소하였고, 다발무게와 갓 두께는 유사하였으며, P49는 갓의 크기는 양친과 유사하나 나머지 6개 형질이 모두 증가하였으며 P72는 다발 유효경수와 갓의 크기는 양친과 유사하나 나머지 5개 형질은 모두 증가하였다. esterase 동위효소 분석 결과 P5는 양친의 밴드를 대부분 가지면서 새로운 밴드양상이 형성되었으며 융합주 P48, P49, P72의 상호간에는 밴드의 차이가 없었으나 양친인 ASI 2001과 P5의 밴드를 대부분 가지는 양상을 나타내었다. 사철느타리 ASI 2016과 느타리 ASI 2018의 4개 융합조합 7개 융합주의 유전형질 분리에 있어서 분리되는 유전자형은 원영양형 prototroph, 양친의 한쪽 편친형, 양친의 다른 편친형, 영양요구성 유전자 재조합형으로 나타나며 그 기대치는 1 : 1 : 1 : 1이나 원영양형이 가장 많았으며 2개 융합주를 제외하고는 양친 중 사철느타리 형질만 분리되었으며 양친형과 유전자 재조합형이 거의 1 : 1로 분리되었다. P5 유전자 재조합주 arg rib와 ASI 2001의 pro orn의 체세포 잡종 P48, P49, P72의 분리에 있어서 pro orn 친은 분리되지 않았으며 각 유전형질 arg, rib, pro, orn의 비가 P49, P72는 거의 4 : 1 : 1 : 1로 나타났으나 P48은 pro, orn형질이 훨씬 적게 나타났으며 유전자 재조합형의 비율이 아주 높은 91%이상이었다.